EVA预辐射接枝NIPAAm及其表面性能

采用空气预辐射接枝的方法，将Ｎ－异丙基丙烯酰胺（ＮＩＰＡＡｍ）接枝于乙烯／乙酸乙烯酯共聚物（ＥＶＡ）上，研究了影响接枝反应的因素，以及接枝物的溶胀性能．结果表明，ＥＶＡ－ｇ－ＮＩＰＡＡｍ具有较好的热敏性．ＳＥＭ和ＤＳＣ对接枝表层的分析也表明，ＥＶＡ－ｇ－ＮＩＰＡＡｍ接枝层的溶胀态有明显的网状微孔结构，因而能容纳大量自由水，而在收缩态无微孔结构，因而含水量很低，且大部分为非自由水．     

含氟聚合物辐射气相接枝研究Ⅱ.PTFE辐射气相接枝共聚物结构表征和性能测试

用扫描电子显微镜（ＳＥＭ）和偏光显微镜（ＰＯＭ）研究了聚四氟乙烯（ＰＴＦＥ）辐射接枝气相丙烯酸（ＡＡ）共聚物膜的表面和断面结构，并分析了膜厚与接枝率的关系，以确证ＰＴＦＥ辐照接枝气相ＡＡ的反应为扩散控制反应．还进一步测试了ＰＴＦＥｇＡＡ膜的亲水性和粘接性能，探寻改性ＰＴＦＥ膜的应用前景     

含氟聚合物辐射气相接枝研究：ⅡPTFE辐射气相接枝共聚物…

用扫描电子显微镜（ＳＥＭ）和偏光显微镜（ＰＯＭ）研究了聚四氟乙烯（ＰＴＦＥ）辐射接枝气相丙烯酸（ＡＡ）共聚物膜的表面和断面结构，并分析了膜厚与接枝率的关系，以确证ＰＴＦＥ辐照接枝气相ＡＡ的反应为扩散控制反应。还进一步测试了ＰＴＦＥ－ｇ－ＡＡ膜的亲水性和粘接性能，探寻改性ＰＴＦＥ膜的应用前景。     

MCS树脂的合成与结构性能表征

将甲基丙烯酸甲酯（ＭＭＡ）、苯乙烯（Ｓｔ）和氯化聚乙烯（ＣＰＥ）进行悬浮接枝聚合,制得了ＭＣＳ树脂,考察了接枝产物的化学结构和组成及其相结构,研究了各种因素对反应的接枝度和接枝效率的影响,并对其结构形态进行了表征。     

接枝共聚单体与淀粉接枝共聚物上浆性能的研究

以Ｃｅ＾４＋为淀粉接枝引发剂，研究了接枝共聚单体对淀粉接枝共聚物（ＳＧＣ）上浆性能的影响。首先通过实验对丙烯酸（ＡＡ）、丙烯酰胺（ＡＭ）、丙烯酸羟乙酯（ＨＥＡ）、丙烯酸甲酯（ＭＡ）、丙烯酸乙酯（ＥＡ）、丙烯酸丁酯（ＢＡ）、甲基丙烯酸甲酯（ＭＭＡ）、甲基丙烯酸丁酯（ＢＭＡ）、醋酸乙烯酯（ＶＡｃ）和丙烯腈（ＡＮ）１０种接枝单体进行筛选，然后根据所归纳出的ＳＧＣ浆料接枝支链的分子结构模型，探讨了几种组合     

HDPE固相接枝丙烯酸的研究

以过氧化苯甲酰（ＢＰＯ）为引发剂、二甲苯为界面剂，研究丙烯酸（ＡＡ）在粉料高密度聚乙烯（ＨＤＰＥ）上的固相接枝反应．红外光谱证实了该接枝反应。Ｘ光衍射发现接枝后的ＨＤＰＥ结晶度下降不多，表明接核反应发生在ＨＤＰＥ的无定区域和晶区表面或晶区缺陷上。实验还发现，随着引发剂用量、ＨＤＰＥ颗粒度的增加，反应温度的升高，单体／聚合物比增加，接枝率提高。本研究制得的ＨＤＰＥ—ｇ—ＡＡ，其接枝率可高达１５．９２％。     

PROCESS STABILITY OF THE EMULSION POLYMERIZATION OF THE GHD LATEX

采用半连续种子乳液聚合技术合成了含甲基丙烯酸缩水甘油酯（ＧＭＡ）、甲基丙烯酸羟乙酯（ＨＥＭＡ）和甲基丙烯酸二甲氨基乙酯（ＤＭＡＥＭＡ）的室温自交联乳液（ＧＨＤ）,研究了聚合工艺和配方对ＭＭＡ＿ＢＡ＿ＨＥＭＡ＿ＤＭＡＥＭＡ体系的聚合过程稳定性的影响．除了聚合过程中形成的水溶性聚合物的架桥凝聚作用之外,反应性官能团间的交联凝聚作用对ＧＨＤ乳液聚合稳定性有重要影响．增加ＨＥＭＡ和ＤＭＡＥＭＡ用量对该聚合过程的稳定性没有明显影响．     

壳聚糖─Cu（Ⅱ）配位聚合物的合成、表征及催化性能研究

采用一种新方法合成了壳聚糖与ＣＵ（Ⅱ）的配位聚合物，并用ＩＲ、ＥＳＲ、ＵＶ—ＶＩＳ、ＤＴＡ—ＴＧ和ＸＰＳ分析手段对配位聚合物进行表征．同时还研究了壳聚糖－ＣＵ（Ⅱ）配位聚合物与Ｎａ２ＳＯ３体系对ＭＭＡ聚合的催化性能，证实ＭＭＡ的聚合机理是按自由基机理进行的．     

LMPE—g—AA在HDPE／MiCa合金中的作用

在氮气气氛下，采用熔融接枝反应，制备了一种低分子量聚乙烯－丙烯酸接枝共聚物，运用小角激光散射技术（ＳＡＬＳ），对高密度聚乙烯／云母／接枝共聚物（ＨＤＰＥ／Ｍｉｃａ／ＬＭＰＥ－ｇ－ＡＡ）三元合金体系的结构参数进行了分析，并从物理力学性能和流支性两方面研究了低分子量聚乙烯－－丙烯酸接枝共聚物对高密度聚乙烯／云母／合金体系的增容作用。     

Burgers方程的交替分组显式方法

本文以求解对流扩散方程的Ｓａｍａｒｓｋｉｉ格式为基础，构造了新的交替分组显式（ＡＧＥ）格式，采用线性化稳定性分析方法得到了格式的无条件（弱）稳定性。模型问题的数值结果表明，本方法比Ｅｖａｎｓ的ＡＧＥ方法好。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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